Cross-linked polyolefin tape

Abstract

The invention relates to polymer tapes that are blends including at least one silane-grafted single-site initiated polyolefin resin. The silane-grafted single-site initiated polyolefin resin generally is a copolymer of ethylene and a C 3 -C 20 alpha-olefin that has a molecular weight distribution between about 1.5 and about 3.5. The polymer tapes include an adhesive on at least one face of the polymer. The polymer tapes can be foamed.

What is claimed is:  
     
       1. A method of making a polymer tape comprising the steps of: 
       providing a cross-linkable polymer mixture including at least one single-site initiated polyolefin resin and a chemical foaming agent;  
       extruding the polymer mixture; and  
       applying an adhesive to the polymer mixture.  
     
     
       2. The method of  claim 1 , further comprising the step of silane-grafting a portion of the polymer mixture. 
     
     
       3. The method of  claim 1 , further comprising the step of silane-grafting the single-site initiated polyolefin resin. 
     
     
       4. The method of  claim 3 , further comprising the step of expanding the polymer mixture to form a foam. 
     
     
       5. The method of  claim 4 , further comprising the step of cross-linking the polymer mixture. 
     
     
       6. The method of  claim 5 , wherein the step of cross-linking the polymer mixture includes exposing the polymer mixture to moisture. 
     
     
       7. A method of making a polymer tape comprising the steps of: 
       providing a cross-linkable polymer mixture including at least one silane-grafted single-site initiated polyolefin resin and a chemical foaming agent;  
       extruding the polymer mixture; and  
       applying an adhesive to the polymer mixture.  
     
     
       8. The method of  claim 7 , further comprising the step of silane-grafting a portion of the polymer mixture. 
     
     
       9. The method of  claim 7 , further comprising the step of expanding the polymer mixture to form a foam. 
     
     
       10. The method of  claim 7 , further comprising the step of cross-linking the polymer mixture. 
     
     
       11. The method of  claim 10 , wherein the step of cross-linking the polymer mixture includes exposing the polymer mixture to moisture.